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1. 发明授权

US08614551B2 SCR dimming circuit and method 有权
标题翻译： SCR调光电路及方法
公开(公告)号：US08614551B2
公开(公告)日：2013-12-24
申请号：US13402025
申请日：2012-02-22
申请人： Shenglun Chen , Wei Chen , Xiaoru Xu
发明人： Shenglun Chen , Wei Chen , Xiaoru Xu
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0845 , Y02B20/348
摘要： The present invention relates to a silicon-controlled rectifier (SCR) dimming circuit and method for regulating the luminance of a light-emitting diode (LED) load. In one embodiment, an SCR dimming circuit can include: an SCR rectifying circuit having an SCR element that receives an AC power supply, and generates a lack-phase AC voltage; a rectifier bridge that converts the lack-phase AC voltage to a lack-phase DC voltage, where the lack-phase DC voltage is filtered through a filter capacitor to generate a smooth DC voltage; a conduction phase angle signal generator that receives the lack-phase DC voltage and generates a controlling signal indicating a conduction phase angle range of the SCR element; and a dimming signal generator that compares the controlling signal and a slope reference signal to output a dimming signal to control the luminance of the LED load.
摘要翻译：本发明涉及一种用于调节发光二极管（LED）负载的亮度的硅控整流器（SCR）调光电路和方法。在一个实施例中，SCR调光电路可以包括：SCR整流电路，其具有接收AC电源的SCR元件，并且产生欠相AC电压; 将缺相相交流电压转换为欠相直流电压的整流桥，其中缺相相电压通过滤波电容滤波以产生平滑的直流电压; 导通相位角信号发生器，其接收所述欠相位的直流电压，并产生表示所述SCR元件的导通相位角范围的控制信号; 以及调光信号发生器，其比较控制信号和斜率参考信号以输出调光信号以控制LED负载的亮度。

2. 发明申请

US20120256553A1 SCR DIMMING CIRCUIT AND METHOD 有权
标题翻译： SCR调试电路和方法
公开(公告)号：US20120256553A1
公开(公告)日：2012-10-11
申请号：US13411738
申请日：2012-03-05
申请人： Shenglun Chen , Wei Chen , Xiaoru Xu
发明人： Shenglun Chen , Wei Chen , Xiaoru Xu
IPC分类号： H05B37/02
CPC分类号： H05B33/0809 , H05B33/0845 , Y02B20/348
摘要： The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates a lack-phase AC voltage based on a sinusoidal AC supply; a rectifier bridge that generates a lack-phase DC voltage based on the lack-phase AC voltage; a conduction angle generator that receives the lack-phase DC voltage, and generates a controlling signal representative of a conduction angle of the SCR element; and a dimming signal generator that generates a dimming signal to regulate luminance of the LED load, where the dimming signal generator receives the controlling signal, an adjustable signal, and a clamping voltage, an amplitude of a dimming phase angle range is selected by a fixed signal determined by the clamping voltage, and the dimming phase angle range may be shifted by regulating the adjustable signal.
摘要翻译：本发明涉及一种用于调节LED负载亮度的SCR调光电路和方法。在一个实施例中，SCR调光电路可以包括：SCR元件，其基于正弦AC电源产生欠相AC电压; 整流桥，基于缺相交流电压产生欠相直流电压; 接收缺相相电压的导通角发生器，并产生表示SCR元件的导通角的控制信号; 以及调光信号发生器，其产生调光信号以调节LED负载的亮度，其中调光信号发生器接收控制信号，可调信号和钳位电压，通过固定的选择信号选择调光相位角范围的幅度通过钳位电压确定的信号和调光相位角范围可以通过调节可调信号而偏移。

3. 发明申请

US20120242237A1 SCR DIMMING CIRCUIT AND METHOD 有权
标题翻译： SCR调试电路和方法
公开(公告)号：US20120242237A1
公开(公告)日：2012-09-27
申请号：US13402025
申请日：2012-02-22
申请人： Shenglun Chen , Wei Chen , Xiaoru Xu
发明人： Shenglun Chen , Wei Chen , Xiaoru Xu
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0845 , Y02B20/348
摘要： The present invention relates to a silicon-controlled rectifier (SCR) dimming circuit and method for regulating the luminance of a light-emitting diode (LED) load. In one embodiment, an SCR dimming circuit can include: an SCR rectifying circuit having an SCR element that receives an AC power supply, and generates a lack-phase AC voltage; a rectifier bridge that converts the lack-phase AC voltage to a lack-phase DC voltage, where the lack-phase DC voltage is filtered through a filter capacitor to generate a smooth DC voltage; a conduction phase angle signal generator that receives the lack-phase DC voltage and generates a controlling signal indicating a conduction phase angle range of the SCR element; and a dimming signal generator that compares the controlling signal and a slope reference signal to output a dimming signal to control the luminance of the LED load.
摘要翻译：本发明涉及一种用于调节发光二极管（LED）负载的亮度的硅控整流器（SCR）调光电路和方法。在一个实施例中，SCR调光电路可以包括：SCR整流电路，其具有接收AC电源的SCR元件，并且产生欠相AC电压; 将缺相相交流电压转换为欠相直流电压的整流桥，其中缺相相电压通过滤波电容滤波以产生平滑的直流电压; 导通相位角信号发生器，其接收所述欠相位的直流电压，并产生表示所述SCR元件的导通相位角范围的控制信号; 以及调光信号发生器，其比较控制信号和斜率参考信号以输出调光信号以控制LED负载的亮度。

4. 发明授权

US08736185B2 SCR dimming circuit and method 有权
标题翻译： SCR调光电路及方法
公开(公告)号：US08736185B2
公开(公告)日：2014-05-27
申请号：US13411738
申请日：2012-03-05
申请人： Shenglun Chen , Wei Chen , Xiaoru Xu
发明人： Shenglun Chen , Wei Chen , Xiaoru Xu
IPC分类号： H05B37/02
CPC分类号： H05B33/0809 , H05B33/0845 , Y02B20/348
摘要： The present invention relates to an SCR dimming circuit and method for regulating the luminance of an LED load. In one embodiment, an SCR dimming circuit can include: an SCR element that generates a lack-phase AC voltage based on a sinusoidal AC supply; a rectifier bridge that generates a lack-phase DC voltage based on the lack-phase AC voltage; a conduction angle generator that receives the lack-phase DC voltage, and generates a controlling signal representative of a conduction angle of the SCR element; and a dimming signal generator that generates a dimming signal to regulate luminance of the LED load, where the dimming signal generator receives the controlling signal, an adjustable signal, and a clamping voltage, an amplitude of a dimming phase angle range is selected by a fixed signal determined by the clamping voltage, and the dimming phase angle range may be shifted by regulating the adjustable signal.
摘要翻译：本发明涉及一种用于调节LED负载亮度的SCR调光电路和方法。在一个实施例中，SCR调光电路可以包括：SCR元件，其基于正弦AC电源产生欠相AC电压; 整流桥，基于缺相交流电压产生欠相直流电压; 接收缺相相电压的导通角发生器，并产生表示SCR元件的导通角的控制信号; 以及调光信号发生器，其产生调光信号以调节LED负载的亮度，其中调光信号发生器接收控制信号，可调信号和钳位电压，通过固定的选择信号选择调光相位角范围的幅度通过钳位电压确定的信号和调光相位角范围可以通过调节可调信号而偏移。

5. 发明授权

US07615974B1 High dimming ratio LED drive circuit 有权
标题翻译：高调光比LED驱动电路
公开(公告)号：US07615974B1
公开(公告)日：2009-11-10
申请号：US11937104
申请日：2007-11-08
申请人： Xiaoru Xu
发明人： Xiaoru Xu
IPC分类号： G05F1/575 , G05F1/59
CPC分类号： H05B33/0815
摘要： The invention relates to a method and an apparatus for controlling average current by pulse modulating an output current. The apparatus includes a constant-on-time switching regulator. During the pulse modulation on-time, an output voltage is regulated at a level corresponding to a defined value of a corresponding output current. A control signal is provided to indicate an adjustment to the output voltage that enables regulation of the output current to the defined value. During the pulse modulation off-time, the output voltage is maintained at the level that substantially corresponds to the defined value of the output current during the pulse-modulation on-time.
摘要翻译：本发明涉及通过脉冲调制输出电流来控制平均电流的方法和装置。该装置包括恒定导通时间开关调节器。在脉冲调制导通时间期间，将输出电压调节到对应于相应输出电流的确定值的电平。提供控制信号以指示对输出电压的调整，使得能够将输出电流调节到所定义的值。在脉冲调制关断期间，输出电压保持在基本对应于脉冲调制导通时间期间输出电流的确定值的水平。

6. 发明授权

US08922174B2 Power factor correction circuit with frequency jittering 有权
标题翻译：功率因数校正电路，频率抖动
公开(公告)号：US08922174B2
公开(公告)日：2014-12-30
申请号：US13447998
申请日：2012-04-16
申请人： Xiaoru Xu
发明人： Xiaoru Xu
IPC分类号： H02M1/42
CPC分类号： H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： The present invention relates to a power factor correction circuit, that can include: an inductor current detector that generates a sampling voltage signal, and sinusoidal half-wave current and voltage signals based on the sampling voltage signal; a mediate signal generator generating slope voltage and clock signals in response to the sinusoidal half-wave voltage signal, where a frequency of each varies with the sinusoidal half-wave voltage signal; a current modulation circuit receiving the sinusoidal half-wave current signal and a voltage feedback signal representative of a power stage output voltage to generate a regulation signal that is compared against the slope voltage signal to generate a modulation signal; and a logic/driving circuit receiving the modulation and clock signals, and generating a controlling signal that controls a power switch with variable frequency to maintain the inductor current in phase with the sinusoidal half-wave voltage signal and the power stage output voltage constant.
摘要翻译：功率因数校正电路技术领域本发明涉及功率因数校正电路，该电路可以包括：产生取样电压信号的电感电流检测器，以及基于采样电压信号的正弦半波电流和电压信号; 中频信号发生器响应于正弦半波电压信号产生斜率电压和时钟信号，其中每个频率随正弦半波电压信号而变化; 接收正弦半波电流信号的电流调制电路和表示功率级输出电压的电压反馈信号，以产生与斜率电压信号进行比较以产生调制信号的调节信号; 以及接收调制和时钟信号的逻辑/驱动电路，并且产生控制可变频率的功率开关的控制信号，以使电感器电流与正弦半波电压信号和功率级输出电压恒定相位。

7. 发明申请

US20120281448A1 POWER FACTOR CORRECTION CIRCUIT 有权
标题翻译：功率因数校正电路
公开(公告)号：US20120281448A1
公开(公告)日：2012-11-08
申请号：US13447998
申请日：2012-04-16
申请人： Xiaoru Xu
发明人： Xiaoru Xu
IPC分类号： H02M7/06 , G05F1/70
CPC分类号： H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： The present invention relates to a power factor correction circuit, that can include: an inductor current detector that generates a sampling voltage signal, and sinusoidal half-wave current and voltage signals based on the sampling voltage signal; a mediate signal generator generating slope voltage and clock signals in response to the sinusoidal half-wave voltage signal, where a frequency of each varies with the sinusoidal half-wave voltage signal; a current modulation circuit receiving the sinusoidal half-wave current signal and a voltage feedback signal representative of a power stage output voltage to generate a regulation signal that is compared against the slope voltage signal to generate a modulation signal; and a logic/driving circuit receiving the modulation and clock signals, and generating a controlling signal that controls a power switch with variable frequency to maintain the inductor current in phase with the sinusoidal half-wave voltage signal and the power stage output voltage constant.
摘要翻译：功率因数校正电路技术领域本发明涉及功率因数校正电路，该电路可以包括：产生取样电压信号的电感电流检测器，以及基于采样电压信号的正弦半波电流和电压信号; 中频信号发生器响应于正弦半波电压信号产生斜率电压和时钟信号，其中每个频率随正弦半波电压信号而变化; 接收正弦半波电流信号的电流调制电路和表示功率级输出电压的电压反馈信号，以产生与斜率电压信号进行比较以产生调制信号的调节信号; 以及接收调制和时钟信号的逻辑/驱动电路，并且产生控制可变频率的功率开关的控制信号，以使电感器电流与正弦半波电压信号和功率级输出电压恒定相位。

8. 发明授权

US07671573B1 Apparatus and method for projected on-time regulator 有权
标题翻译：投影定时调节器的装置和方法
公开(公告)号：US07671573B1
公开(公告)日：2010-03-02
申请号：US12129623
申请日：2008-05-29
申请人： Lawrence Hok Sun Ling , Xiaoru Xu
发明人： Lawrence Hok Sun Ling , Xiaoru Xu
IPC分类号： G05F1/00
CPC分类号： H02M3/156
摘要： A projected on-time (POT) switching regulator is provided. The regulator includes a switching regulator controller and a main switch. The controller includes a feedback comparator and an on-timer. The feedback comparator compares the output voltage to a reference voltage. Whenever the feedback comparator trips, the main switch is turned on, and the on-timer controls the turn-on duration (on-time) of the main switch, where the duration is adjusted by the input and output voltages according to a preset transfer function. The transfer function is applicable to both CCM and DCM operation. However, during CCM mode operation, at least above a minimum on-time, the on-time is adjusted so that the switching frequency of the regulator is approximately constant. The on-timer includes a comparator that compares an adjustable voltage VFQ to a ramp voltage VIFQ generated by providing an adjustable current IFQ to a capacitor CREF. VFQ and IFQ are adjusted so that, during CCM mode operation, at least above the minimum on-time, the switching frequency of the regulator is approximately constant.
摘要翻译：提供了一个预定的导通时间（POT）开关稳压器。调压器包括开关调节器控制器和主开关。控制器包括反馈比较器和定时器。反馈比较器将输出电压与参考电压进行比较。每当反馈比较器跳闸时，主开关接通，并且定时器控制主开关的接通时间（导通时间），其中持续时间根据预设的传送由输入和输出电压调节功能。传输功能适用于CCM和DCM操作。然而，在CCM模式操作期间，至少高于最小导通时间，导通时间被调节，使得调节器的开关频率近似恒定。定时器包括比较器，其将可调电压VFQ与通过向电容器CREF提供可调电流IFQ产生的斜坡电压VIFQ进行比较。调整VFQ和IFQ，使得在CCM模式操作期间，至少高于最小导通时间，调节器的开关频率近似恒定。

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